코로나 버스 에어컨 통해 퍼져...중국에서 20여 건 발생 경고 VIDEO: Coronavirus could spread through AIR CON on buses, say Chinese scientists...
Coronavirus could spread through AIR CON on buses, say Chinese scientists who traced 24 cases back to a single passenger who shared an hour-and-a-half journey with them
Scientists believe air conditioning unit exacerbated transmission of virus
Bus had a split AC unit, which recirculates same air from within the bus
British experts highlighted the AC units as huge Covid-19 risk last month
Sustainable Bus
edited by kcontents
By CONNOR BOYD HEALTH REPORTER FOR MAILONLINE
PUBLISHED: 16:22 BST, 1 September 2020 | UPDATED: 19:10 BST, 1 September 2020
코로나 버스 에어컨 통해 퍼져...중국에서 20여 건 발생 경고 코로나바이러스는 버스에서 에어컨을 통해 퍼지고 있으며, 중국에서 20여 건의 환자가 발생하자 과학자들은 경고하고 있다. 저장성 버스 승객 24명은 1월 19일 1시간 30분여의 여정 끝에 바이러스 양성반응이 나왔다. 과학자들은 에어컨이 버스를 통해 바이러스의 물방울을 퍼트려 바이러스의 전염을 가능케 했다고 믿고 있다. 어떤 에어컨은 실외에서 공기를 들여와 다시 배출하는 반면, 다른 에어컨은 스플릿 유닛이라고 불리는 다른 에어컨은 같은 공기를 재순환시키는데, 이번 경우에 해당한다. 지난 달 영국 전문가들은 코비드-19의 확산을 막기 위해 그러한 장치들을 끄거나 창문을 열어놓고 사용할 필요가 있다고 경고했다. 그리고 영국의 사무실, 영화관, 극장 및 기타 실내 편의시설에는 신선한 공기가 밀려나도록 보장하는 새로운 서비스 에어콘 장치가 있어야 한다. 언급했ㄷ. 황기철 콘페이퍼 에디터 Ki Chul Hwang Conpaper editor curator |
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Coronavirus spreads through air conditioning units on buses, scientists have warned after two dozen cases were linked back to a single passenger in China.
Twenty-four passengers on the bus in Zhejiang Province tested positive for the virus after a single hour-and-a-half journey on January 19.
Scientists believe the air conditioning unit allowed the transmission of the virus by spreading viral droplets right through the bus.
Some air conditioners take in air from outdoors and expel it again, while others, called split units, recirculate the same air, which was the case in this instance.
British experts last month warned such units need to be either turned off or used with the windows open to prevent the spread of Covid-19.
And offices, cinemas, theatres and other indoor amenities in the UK are required to have newly serviced air con units that ensure fresh air is being pushed out.
Buses have once again been earmarked as potential breeding grounds for Covid-19 after two dozen cases were linked back to a single passenger in China (stock image of a London bus)
The latest study, published in JAMA Internal Medicine, was carried out by scientists at the Zhejiang Provincial Center for Disease Control and Prevention.
They traced the outbreak back to a single passenger on a bus in the eastern province on January 19, days before China locked down.
Passengers were not socially distanced but some were thought to have been wearing face masks.
A total of 68 passengers rode the bus for an hour and forty minutes to attend a Buddhist worship event.
Twenty-four passengers tested positive for Covid-19, with 18 of them suffering 'moderate illness'. The other six either had mild sickness or were asymptomatic.
Passengers sat closest to the original patient were not more likely to get the disease than those at the opposite end of the bus.
This suggests the air con played a role in picking up the viral particles and recycling them elsewhere through vents on the bus.
Writing in the paper, the authors said: 'The investigations suggest that, in closed environments with air recirculation, SARS-CoV-2 is a highly transmissible pathogen.
'Our finding of potential airborne transmission has important public health significance, and future efforts at prevention and control should consider the potential for airborne spread of COVID-19.'
The outbreak comes on the back of warnings by British experts that so-called split AC units need to be either turned off or used with the windows open.
Dr. Shaun Fitzgerald, a fellow at the Royal Academy of Engineering, said that opening a window while having the air conditioning turned on may be the best way to reduce the risk.
'The recommended strategy now, if you have one of these split units, is to throw the window open and sacrifice your desire for a cold or cooler environment,’ Fitzgerald told the Telegraph.
‘If there is a modicum of wind it will move the air around. If you can’t open a window turn the unit off.’
The Chartered Institution of Building Service Engineers warns on its website: 'Air conditioning units that do not have a ‘dedicated source of outside air supply into a room… could be responsible for recirculating and spreading airborne viral particles into the path of socially distanced users.'
Researchers in April blamed the air conditioning unit for the spread of coronavirus among at least nine other diners who were eating in a restaurant in Guangzhou, China, in January.
A research paper which appeared in the journal Emerging Infectious Diseases investigated the incident at the eatery in January, where a family had arrived from Wuhan - the city where the Covid-19 pandemic began.
Researchers say one member of that family had an asymptomatic case, and barely two weeks later, the patient along with nine others, including members of their family, as well as two other groups on nearby tables in the restaurant, had all become ill with the virus.
The affected tables in the windowless venue were around three feet away from each other as the authors claim the most likely cause of this outbreak was droplet transmission.
However, they say that droplets only remain in the air for a short time and only travel short distances.
Therefore, they concluded, the air conditioner was likely to have spread the virus further between the affected tables.
COVID-19 can spread 4. 5 meters in enclosed, air-conditioned vehicle
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